1. Displayed on the PL/SQL operation timeout;
2. The landing on the CMD display TNS: permission is denied

CodePudding user response:

Network problems, check whether the network of reasons,

CodePudding user response:

Ping the address of the server,
Tnsping connection string

CodePudding user response:

1, ping can database server address see ping
2, check the database service monitoring is started

CodePudding user response:

Add two upstairs, check the firewall Settings